Now we need to add the 12 images (1 for each month) as bands to a new image collection. This can be done by the code below.

18. Copy and paste the code below into your code editor

// Create a list with months
var monthnames = ["jan","feb","mar","apr","may","jun","jul","aug","sep","oct","nov","dec"]
// make a list of from the imagecollection
var myNDVIlist = monthlyNDVI.select("NDVI").toList(12);
// create a new image from the month January
var myCollection = ee.Image(myNDVIlist.get(0)).rename("jan");
// add the image of each month as band to the image
for (var i = 1; i < myNDVIlist.length().getInfo(); i++) {
var mymap = ee.Image(myNDVIlist.get(i)).rename(monthnames[i]);
myCollection = myCollection.addBands(mymap);
}